Improve changelog entry for stream/datagram aliases

This was introduced in e11498e, where I
added a changelog entry about some internal type changes.

However, the change in question not only changed the internal types but
also added user-facing aliases, so the changelog entry should actually
reflect that instead of talking about some internal chages that are
totally irrelevant to users of ip2unix.

Signed-off-by: aszlig <[email protected]>

CHANGELOG.md

@@ -16,6 +16,7 @@ The format is based on [Keep a Changelog], and this project adheres to
 - Unlink socket file before `bind` if `SO_REUSEADDR` is used.
 - Support for Linux abstract sockets.
 - Support for matching an existing Unix domain socket or abstract socket.
+- Add `stream`/`datagram` aliases for `tcp`/`udp` socket types.
 
 ### Changed
 - Rule files (`-f`) are now just a list of newline-separated rule (`-r`)
@@ -26,7 +27,6 @@ The format is based on [Keep a Changelog], and this project adheres to
 - Turn into a Nix Flake.
 - Improve serializer to be more robust in end-of-stream conditions.
 - Bump requirements to require at least GCC version 9.
-- Internally use `stream` instead of `tcp` and `datagram` for `udp`.
 
 ### Removed
 - Badges (eg. LGTM and build status) in README and Hydra.